Question

Calcule:a) 3! + 2! – 1!
b) 3!/4! + 4!/5!
c) 7! / 5!2!​

Answer 1

Resposta:

Explicação passo-a-passo:

a.

3!+2!-1!=

6+2-1=

8-1=

7

b.

3!/4! +4!/5!=

3!/4.3! + 4!/4.5!=

1/4 + 1/5=

5/20 + 4/20=

9/20

c.

7!/5!2!=

7.6.5!/5!.2! =  (corta 5! com 5!)

7.6/2=

42/2=

21